Brochure PC eng_01-09.indd - Veolia Water Solutions & Technologies

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The EVALED PC Solution is the range of evaporators which uses heat pump for the treatment of many kind of waste waters. This technology has been refined over many years in terms of flexibility, low energy consumption and reliability. Main benefits of heat pump: evaporators Significant reduction of COD in the distillate High yield and and low quantity of concentrate to dispose of Control of foaming Excellent separation of surfactants Total separation of metals Consistent distillate quality Fully automatic operation Low maintenance EVALED PC evaporators comprehends E Series with forced circulation and an external shell&tube heat exchanger and R Series with jacket type heat exchanger and scraped heating surface.
Materials VWS Italia, in co-operation with respected materials research centres, selects the most suitable materials for the safe management of aggressive liquids. The resistance to corrosion is the main features of every EVALED evaporators, essential when dealing with extremely concentrated liquids. Austenic stainless steel AISI 316L (Number: 1.4435 – X2 CrNiMo 18-14-3) Austenic weakly bound structure, non-hardening, non-magnetic. The low percentage of Carbon in this alloy reduces the risk of intergranular corrosion at high temperatures. Uses: alkaline liquids, acid liquids (pH>4) with a low percentage of chlorides, oil emulsions, liquids from flexographic printing. Silicon Carbide (SiC) Chemically inert material resistant to almost all aggressive substances, usually matched with another chemically inert material, PTFE, a fluoride co-polymer used for coating the inner surfaces of the boiling chamber. Uses: pickling waste waters, galvanic wastewaters, and aggressive liquids. EVALED PC Technical Reports Superduplex stainless steel (Number: 1.4410 - X2 CrNiMo 25-7-4) Austenic-ferritic structure, magnetic. The high percentage of Chrome gives excellent resistance to localised corrosion. Uses: acid liquids (pH>3) with high chloride and metals content, galvanic waste waters, landfill leachate. Nickel alloy (Number: 2.4819 – NiMo 16 Cr15 W) High flexibility Cr-Ni.Mo steel. The low Carbon content ensures resistance to the formation of carbides at zones exposed to thermal variation. It has excellent resistance to localised corrosion, both in oxidising and reducing environments, even at high temperatures. Uses: very acid liquids (pH>2) with high content of chlorides, fluorides and metals, anodising waste waters, special applications.
Page 1: EVALED PC Vacuum heat pump evapora
Page 5 and 6: Process diagram Boiling chamber Dem
Page 7 and 8: Process diagram Vapour Expansion Va

Brochure PC eng_01-09.indd - Veolia Water Solutions & Technologies

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